Question

HELP ASAP!!!!! milk of magnesia has the chemical formula Mg(OH)2. what is the mass of 3.2 moles of milk of magnesia? the molar mass of magnesium is 24.3 grams er mole. the olar of hydrogen is 1.0 grams per mole. the mass of oxygen is 16.0 grams per mole????

Answer 1

Answer:

186.56 grams

Explanation:

In order to calculate this first we have to calculate the molar mass of Mg(OH)2 and we do that by calculating how many molecules of each element we have and then adding them up.

Wo we have 2 molecules of oxygen, 2 molecules of Hydrogen and 1 of magnesium:

2(16)=32

2(1)=2

1(24.3)=24.3

There are 58.3 grams in a mol of milk of Magnesia so we just multiply that by 3.2 moles.

(58.3)(3.2)=186.56 grams in 3.2 moles of milk of magnesia.

Answer 2

Mg(OH)2

Mg: 1
O: 2
H: 2

Mg. O H
24.3g 32g. 2

58.3g in 1 mol of Mg(OH)2

3.2mol of Mg(OH)2 x 58.3g of Mg(OH)2
-------------------------
1 mol of Mg(OH)2

= 186.56 g of Mg(OH)2 in 3.2 mols of Mg(OH)2